Laser scanning method, laser scanning device, and program
AssigneeTopcon Corporation
InventorsYou SASAKI, Hiroaki SUGIMOTO
Life of this patent
Estimating the term…
Abstract
The accuracy of surveying work using laser scanning is improved. A laser scanning method including performing: a first laser scan on a range including a reflective prism with a known position using a laser scanner (step S103) ; detection of the reflective prism based on scan data obtained by the first laser scan (step S106) ; and a second laser scan on the reflective prism in a state where a gradient portion of a light amount distribution of scanning light is widened compared to a case of the first laser scan (step S105).
Claims14
A laser scanning method comprising:
- performing a first laser scan on a range including a reflective prism with a known position using a laser scanner;
- detecting the reflective prism based on scan data obtained by the first laser scan;
- and
- performing a second laser scan on the reflective prism in a state where a gradient portion of a light amount distribution of scanning light is widened compared to a case of the first laser scan.
A computer readable medium storing computer program instructions, which, when executed on a processor, cause the processor to perform operations comprising:
- performing a first laser scan on a range including a reflective prism with a known position using a laser scanner;
- detecting of the reflective prism based on scan data obtained by the first laser scan;
- and
- performing a second laser scan on the reflective prism in a state where a gradient portion of a light amount distribution of scanning light is widened compared to a case of the first laser scan.
A laser scanning device comprising:
- a target detection unit that, based on scan data obtained by a first laser scan on a range including a reflective prism with a known position using a laser scanner, detects the reflective prism;
- and
- a scanning condition setting unit that sets a condition for a second laser scan on the reflective prism in a state where a gradient portion of a light amount distribution of scanning light is widened compared to a case of the first laser scan.
A laser scanning method comprising:
- performing a first laser scan using a laser scanner;
- capturing of a captured image of an object of the first laser scan;
- creating a depth map including predicted distance information of the object in the captured image from an image-capturing viewpoint;
- creating of a point cloud image, the point cloud image being an image drawn by one or more points in viewing a point cloud obtained by the first laser scan from a viewpoint of the laser scan;
- and
- detecting a point with abnormal distance information by comparing a distribution of the predicted distance in the depth map with a distribution of a ranging value of each point in the point cloud image.
A computer readable medium storing computer program instructions, which, when executed on a processor, cause the processor to perform operations comprising:
- acquiring data of a first laser scan using a laser scanner;
- acquiring data of a captured image of an object of the first laser scan;
- creating a depth map including predicted distance information of the object in the captured image from an image-capturing viewpoint;
- creating a point cloud image, the point cloud image being an image drawn by one or more points in viewing a point cloud obtained by the first laser scan from a viewpoint of the laser scan;
- and
- detecting a point with abnormal distance information by comparing a distribution of the predicted distance in the depth map with a distribution of a ranging value of each point in the point cloud image.
Dependencies are inferred from the claim text.